The Giga is a nice incremental improvement on an already popular product that should help Buffalo boost its almost 27% share of the U.S. NAS market (source: NPD TechWorld April, 2005). Pricing is about 25% higher than its 10/100 LinkStation siblings, which is what I guess Buffalo thought the market can bear, especially given there is no viable competition right now.
So is it a buy? I'd like to see a more flexible print server, and some logging capability and email alerts couldn't hurt. But it's currently the least expensive way to go if you have a gigabit Ethernet LAN and want a NAS that can really take advantage of it. And that will probably be fine for those with an itch that the Giga LinkStation scratches.